STANDARD Physics Mechanical Properties Of Solids Class 11 Questions

Match column I with column II.

The breaking stress of a wire depends upon

According the Hooke’s law of elasticity. If stress is increased, the ratio of stress to strain

Substances which can be stretched to cause large strains are called

Which of the following graphs represents stress-strain variation for elastomers?

The ratio of tensile stress to the longitudinal strain is defined as

Identical spring of steel and copper (Yₛₜₑₑₗ > Ycopper) are equally stretched.

Let Yₛ and Yₐ represent Young’s modulus for steel and aluminium respectively. It is said that steel is more elastic than aluminium. Therefore, it follows that

If the work done in stretching a wire by 1 mm is 2J, the work necessary for stretching another wire of same material but with double radius of cross-section and half the length by 1 mm is

A wire of length L and radius r is clamped at one end. On stretching the other end of the wire with a force F, the increase in its length is L. If another wire of same material but of length 2L and radius 2r is stretched with a force 2F, the increase in its length will be

A light rod of length 2 m is suspended from the ceiling horizontally by means of two vertical wires of equal length tied to its ends. One of the wires is made of steel and is of cross-section 0.1 cm² and the other of brass off cross-section 0.2 cm². Along the rod at what distance a weight may be hung to produce equal stresses in both the wires? (Yₛₜₑₑₗ = 2 × 10¹¹ N m⁻², Y₆ᵣₐₛₛ = 1 × 10¹¹ N m⁻²)

The radii and Young’s moduli of two uniform wires A and B are in the ratio 2 : 1 and 1 : 2 respectively. Both wires are subjected to the same longitudinal force. If the increase in length of the wire A is one percent, the percentage increase in length of the wire B is

A steel rod of length 1 m and radius 10 mm is stretched by a force 100 kN along its length. The stress produced in the rod is (Y_steel = 2 × 10¹¹ N m⁻²)

A 15 kg mass fastened to the end of a steel wire of unstretched length 1.0 m is whirled in a vertical circle with an angular velocity of 2 rev s⁻¹ at the bottom of the circle. The cross-section of the wire is 0.05 cm². The elongation of the wire when the mass is at the lowest point of its path is (Take, g = 10 m s⁻², Yₛₜₑₑₗ = 2 × 10¹¹ N m⁻²)

A wire of length L and area of cross-section A, is stretched by a load. The elongation produced in the wire is l. If Y is the Young’s modulus of the material of the wire, then the force constant of the wire is

The ratio of shearing stress to the shearing strain is defined as

The shear modulus is also known as

Which one of the following statements is correct? In the case of

For most materials the Young’s modulus is n times the modulus of rigidity, where n is

The metal cube of side 10 cm is subjected to a shearing stress of 10⁴ N m⁻². The modulus of rigidity if the top of the cube is displaced by 0.05 cm with respect to its bottom is

Two parallel and opposite forces each 5000 N are applied tangentially to the upper and lower faces of a cubical metal block off side 25 cm. The angle of shear is (The shear modulus of the metal is 80 GPa.)